Depression: Steroids

I Don't Understand Depression!

Many women in my church, young and old, have told me they suffer or have suffered from depression. Some of them have been treated (? I'm not sure if this means they were admitted to a hospital or not) and I think all of them have been on some sort of medication like anxiety medication or full blown depression like Prozac. I don't suffer from it but I am asking if anyone here can tell me exactly what it is without medical terminology. I don't have a history of it in my family and I can't recall any of my friends having it so I don't...